Yes the code compiles fine on both side (VB.Net and Managed VC++ DLL). No
errors or warnings.

On the VB.Net side I get an:

   An unhandled exception of type 'System.NullReferenceException' occurred
in cdmsclientdotnet.dll
   Additional information: Object reference not set to an instance of an
object.

When executing this on the Managed VC++ side:

    pDataPtr = (UBYTE *)new char[dwDataSize];

Here is a bigger code fragment:

Managed VC++ DLL:

namespace CDMSClient_SQL
   {
   [DllImport("CDMSClient.dll", EntryPoint = "SQLGetRows", CharSet = Ansi)]
       STATUS SQLGetRows(const Int32 RowCount, const Int32 DataSize, UBYTE
*Data, String *Columns, String *From, String *Where, String *OrderBy);

   [DllImport("CDMSClient.dll", EntryPoint = "SQLGetRowInfo", CharSet =
Ansi)]
       STATUS SQLGetRowInfo(Int32 &RowCount, Int32 &ColumnCount, Int32
&DataSize, String *Columns, String *From, String *Where);
   }

Array *CCDMSClientInterface::SQLGetRows(const Int32 MaxRows, String
*Columns, String *From, String *Where, String *OrderBy)
   {
   STATUS Status = EC_OK;
   Int32 dwRowCount = 0;
   Int32 dwColumnCount = 0;
   Int32 dwDataSize = 0;
   Array *Data = NULL;
   UBYTE __pin *pDataPtr = NULL;

   Status = CDMSClient_SQL::SQLGetRowInfo(dwRowCount, dwColumnCount,
dwDataSize, Columns, From, Where);
   if (Status == EC_OK)
       {
       pDataPtr = (UBYTE *)new char[dwDataSize];    // <--- This is the
line that fails in the Managed VC++ Side
       Status = CDMSClient_SQL::SQLGetRows(dwRowCount, dwDataSize,
pDataPtr, "*", "CDMS_Config", "", "");
       if (Status == EC_OK)
           Data = Convert_CDBArray_2_Object(pDataPtr);
       }

   return (Data);
   }

VB.Net Side of code:

Imports ClientInterface = CDMSClientDotNet.CCDMSClientInterface

Module Module1

   Sub Main()
       Dim ci As ClientInterface = New ClientInterface
       Dim Data As Array
       Dim Status As Int32

       Status = ci.SetApplicationID("43C1F2F1-CB68-4B89-A8C8-5E0C42CE4866")
       If Status = 1 Then
           Status = ci.SetDomain("Primary")
           If Status = 1 Then
               Status = ci.CreateServerContext()
               If Status = 1 Then
                   Status = ci.Login("admin", "optical")
                   If Status = 1 Then
                       Console.WriteLine("Logged In!")

                       Data = ci.SQLGetRows(1000, "*", "CDMS_Config", "",
"")        // <---This is the line that fails in the VB.Net side

                       ci.Logout()
                   Else
                       Console.WriteLine("Failed to Login!")
                   End If
                   ci.DeleteServerContext()
               Else
                   Console.WriteLine("Failed to Create Server Context!")
               End If
           Else
               Console.WriteLine("Failed to Set Domain!")
           End If
       Else
           Console.WriteLine("Failed to Set ApplicationID!")
       End If
   End Sub

End Module

I have many functions that pass data from the server side to the client side
via a memory buffer.  This data in the memory buffer is parsed and put back
into a dynamic array (Custom C++ class called a CDBArray).  The first
function that I'm trying to get to work, fetches a database table from the
server side and marshalls it back over to the client side. The Server and
Client is using RPC to marshall data back and forth. (Just a side note, The
client side can not access the database directly via ODBC or anything else.
It must go thought my client dll.  This is done for security reason to keep
the client side locked down.)

Any ideas or suggestion are more than welcomed!!

Thanks Again!
Weston Fryatt